I did not watch it. No need to really. They are designed for slightly different purposes and really aren't comparable tit for tat. NF-F12 is specifically a heatsink fan. The A12 is that and case fan. It's an all rounder.
It's not overkill for a case fan, having a strong directional airflow pattern helps get the air in and out quickly which means less time to heat up inside the case making the case temps hotter. This is where the A12 is good at alongside a heatsink fan. It was marketed as such originally. Which is why I bought them.
Just imagine if the A12 was also 30mm thick. I'm sure it would perform better. More surface area to move air or ability to create higher pressure, it will perform better. Just physics at that point.
I'm not saying it's impossible for noctua to get beat, just I don't think it's a direct comparison.